Clarifier bowl



March 4, 1930.

L.` D. JONES Er L 1,749,538

CLARIFIER Bowl.

Filed Sept. 4l 1925 EM IIMMMF .[TwenZo-r-J Ieodorws, dnrhuru. yef-J;

Patented Mar. 4,y 1930 A UNITED STATES 4lfA-'IIENT OFFICE LEo D. JONES AND ARTHUR U. AYEEs, or PEILADELPEIA, PENNSYLVANIA, AssreN- ons To TEE sHAEPLEs SPECIALTY COMPANY, or PHILADELPHIA, PENNSYLVANIA,

A CORPORATION OF DELAWARE CLARIEIEE. Bou/"L Applicationfiled September 4, 19,25..` Serial No. 54,478.

Our invention relates to centrifugal machines of the type used for the clariiication of liquids by the extraction therefrom by centrifugal force of the larger and heavier particles of solid matter therein, which are accumulated in the bowl, while the liquid and minute light particles disseminated therein flow through the bowl. rlhe bowl is stopped from time to time to clean the detritus therefrom.

kThe eectiveness of the concentration in the bowl of impurities from liquid flowing therethrough is largely dependent upon the length of time the liquid is subjected to centrifugal force and the depth of the liquid stratum in the bowl, and to Secure high eiiiciency it is desirable that such factors be variable to meet varying conditions arising in the treatment of different liquids.

Our improvements are designed to provide means for effecting variations in the depth of the liquid stratum in the bowl and in the duration of the treatment thereof, and to facilitate the cleaning of aggregate or detritus from the bowl.

The characteristic features of our improvements will more fully appear from the following description and the accompanying drawings in illustration thereof.

In the drawings, Fig. l is a part sectional elevation of a centrifugal clarifier having our improvements applied thereto; and Fig. 2 is an enlarged sectional view of the upper part of the clarifier bowl.

In the form illustrated in the drawings, our improvements are applied to centrifugal clarifier of the high speed type and comprising a frame A having a bearing B on which is journalled a power driven pulley C. A flexible shaft D depending from the pulley C has suspended therefrom a clarifier bowl kso E supplied through its bottom with the substance to be clarified.

The] bowl shell l has its upper portion threaded for the reception of the threaded body 2 of the top 2, which is provided with a pilot 3 below its threaded zone and with a lip 4 having the surface 5 normal to the axis of the bowl and engaging a complementary surface 6 of the Shell to draw surfaces of the threads' andv 8 into close contact, making tight Joints, and align the axis of the'top with the axis of the shell. A Stud 9 screwed 'A discharge from these outlet passages is controlled by a ring dam 11 having a narrow annular bead 11a on the bottom thereof which isr tightly clamped' against thetop of the body 9, by a coupling nut 12 threaded on the periphery of the body and having a lip engaging the top of the ring. The annular inner rim 11 of the detachable ring daml is preferably turned to a narrow edge and forms an-annular weir surrounding the neck 2 and concentric with the axis of the bowl.

The depth oftheliquid stratum in the bowl and the duration of its" retention therein is dependent upon the position of the weir l1', and such factors may be varied by providing the bowl with rings l1 containing apertures of different diameters. The larger the central aperture in the ring, the thinner will be the Stratum of liquid retained in the bowl controlled thereby and the shorter will be the duration of treatment of the liquid passing through the bowl. Conversely, the smaller the diameter of the central aperture in the ring, the thicker will be the stratum of liquid in the bowl and the longer the duration of treatment of the liquid passing through the bowl. rl`he ring may be easily changed by unscrewing the clamping nut 12 and uncoupling the bowl from the shaft D. The removal of the ring affords convenient access to the 'larger passages 10 into the interior1 of the bowl for flushing or scraping accumulations from the wall thereof.

Such machines are particularly adapted for the extraction of only the larger or heavier particles from liquid containing solids of lili) of sizes, kinds and proportions of impurities to be extracted, as well as of substances which it is desired to retain in suspension in the liquid, can be satisfactorily handled with a single clarifier bowl by means of our changeable ring dams which permita maximum degree of separation of impurities under given conditions without disruption of the enamel, dye or the like subjected to treatment.

'Having described our invention, we claim: A centrifugal clariier bowl, comprising a substantially cylindrical bowl shellropen at one end, a head for the open end of said shell and comprising a neck adapted for supporting and rotating said bowl `and a disc-like portion secured to said neck and to the open end of said shell and having passages extending therethrough in the direction of the axis of the bowl, the radially outermost walls of said passages being substantially parallel with the axis of the bowl and being spaced from said axis a radial distance substantially equal to the radial distance from the axis to the inner wall of said shell, the radially innermost portion of said passages lying adjacent said neck and said passages providing unobstructed access to the interior of the bowl, a removable and replaceable ring dam surrounding said neck in spaced relation and extending radially outward beyond the outermost wall of said passages, and means clamping said dam in position to control discharge through said passages.

In testimony whereof we have hereunto set our names this 3l day of August, 1925.`

LEO D. JONES. ARTHUR U. AYRES. 

